CN103165824B - Organic electroluminescence display device and manufacture method thereof - Google Patents
Organic electroluminescence display device and manufacture method thereof Download PDFInfo
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- CN103165824B CN103165824B CN201110414523.7A CN201110414523A CN103165824B CN 103165824 B CN103165824 B CN 103165824B CN 201110414523 A CN201110414523 A CN 201110414523A CN 103165824 B CN103165824 B CN 103165824B
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Abstract
A kind of organic electroluminescence display device of the present invention and manufacture method thereof.This organic electroluminescence display device at least comprises: one first assembly, has a first substrate and an organic electroluminescence unit is formed on first substrate; One second assembly, with the first assembly to group, and comprises a second substrate, is formed at a filter layer on second substrate and a shielding pattern layer.Filter layer has multiple colorized optical filtering district, and shielding pattern layer to be positioned in those colorized optical filtering districts and to be looped around the periphery in respectively this colorized optical filtering district respectively.Display unit more comprises multiple sept, contact filter layer and corresponding shielding pattern layer place, and those septs is between the first assembly and the second assembly.
Description
Technical field
The present invention relates to a kind of display unit and manufacture method thereof, and particularly relate to a kind of organic electroluminescence display device and manufacture method thereof.
Background technology
Flat display apparatus is as liquid crystal indicator (LiquidCrystalDisplayDevice, LCD), plasm display device (PlasmaDisplayPanel, or organic electroluminescence display device (OrganicElectroluminescentDisplay PDP), OLED) CRT display is come compact more in the past, therefore becomes flat display apparatus common now gradually.Wherein, organic electroluminescence display device has more frivolous, deflection, portable, full-color, high brightness, power saving, the advantage such as wide viewing angle and high answer speed.
The OLED display technology of current monochrome has been tending towards ripe, but considers the level as next flat-panel screens and its application from generation to generation, and development Full-color OLED is inevitable trend.The current true color technology of OLED has three kinds: 1. full-color required RGB tri-time pixel (subpixel) is reached by independently three elements respectively.2. utilized by Nan dian Yao color conversion layer (colorchangemedium, CCM) to convert RGB color to.3. utilized by white light OLED colored filter (colorfilter) to convert RGB color to.Three kinds of methods respectively have pluses and minuses.The third method utilize white light emitting element to add colored filter is to make Full-color OLED because LCD industry uses the technology of colored filter very ripe, as long as find out the RGB filter of applicable white light OLED, what this technology should be very fast be transferred to OLED uses.And the relatively easy white light OLED of element manufacture craft adds that colored filter just becomes the possibility mode reducing Full-color OLED manufacturing cost.
This kind of organic electroluminescence display device is mainly formed group by a colorized optical filtering assembly (CFassembly) and an organic EL component (OLEDassembly), and with sept control gap between two assemblies.Organic EL component comprises the first substrate with film crystal pipe unit, organic electroluminescence unit, such as, be to be folded in (such as a reflecting electrode and a through electrode) between two electrodes, is formed on film crystal pipe unit.The method for making of existing colorized optical filtering assembly is such as form black matrix" (BM) with gold-tinted lithographic fabrication process on the glass substrate completing pre-treatment (as cleaning up), form a chromatic filter layer again, as gradation formed redness (CF-R),
(CF-G) is Yu the color layer of Blue look (CF-B) for look; Form a cover layer (overcoat, OC) afterwards again, cover chromatic filter layer with whole.Due to red,
look with the color layer thickness of Blue look not identical, and tectal formation can make it reach planarization, and sept can be formed on cover layer, with organic EL component to group.But tectal existence not only increases the integral thickness of display unit, also make this device namely can produce the situation of colour cast in certain angle.
In addition, the position of general sept be arranged on redness,
se Huo Blue look color layer wherein side of the same colour, but for arranging sept, the width of the black matrix area of this look must be increased, therefore the viewing area size of this look reduces thereupon, and sacrifices the aperture opening ratio of this look.
Summary of the invention
Because above-mentioned problem, the object of the present invention is to provide a kind of organic electroluminescence display device and manufacture method thereof, the integral thickness of display unit can be reduced, simplify manufacture craft, and improve colour cast simultaneously, also not sacrifice the aperture opening ratio of assorted viewing area.
For reaching above-mentioned purpose, according to an aspect of the present invention, proposing a kind of organic electroluminescence display device and at least comprising: one first assembly, there is a first substrate and an organic electroluminescence unit is formed on first substrate; One second assembly, with the first assembly to group, and comprises a second substrate, is formed at a filter layer on second substrate and a shielding pattern layer.Filter layer has multiple colorized optical filtering district, and shielding pattern layer to be positioned in those colorized optical filtering districts and to be looped around the periphery in respectively this colorized optical filtering district respectively.Display unit more comprises multiple sept (spacers), be formed on filter layer and corresponding shielding pattern layer place, and those septs is between the first assembly and the second assembly.In one embodiment, at least one colorized optical filtering district has an extension, and extension extends on its peripheral this corresponding shielding pattern layer, and sept is contacted with extension.
According to a further aspect in the invention, propose a kind of manufacture method of organic electroluminescence display device, at least comprise:
One first assembly is provided, comprises
One first substrate is provided;
Form an organic electroluminescence unit on first substrate;
One second assembly is provided, comprises:
One second substrate is provided;
Form a filter layer on second substrate, wherein filter layer has multiple colorized optical filtering district
Form a shielding pattern layer is also surrounded on those colorized optical filtering districts respectively periphery in second substrate place; Form a sept (spacers) and contact filter layer and corresponding shielding pattern layer place; With
To group first assembly and the second assembly, and those septs are between the first assembly and the second assembly.
For foregoing of the present invention can be become apparent, special embodiment below, and coordinate appended accompanying drawing, be described in detail below:
Accompanying drawing explanation
Fig. 1 is the part sectioned view of one of embodiment of the present invention organic electroluminescence display device;
Fig. 2 is the top view of the single pixel region of display unit of the straight strip type array color filter area of one embodiment of the invention;
Fig. 3 is the generalized section of display unit along hatching AA ' of Fig. 2;
Fig. 4 is the top view of the single pixel region of display unit of the square array color filter area of another embodiment of the present invention;
Fig. 5 A is the part sectioned view of the first simulation aspect of organic electroluminescence display device, and its display unit is a kind of structure of embodiment;
Fig. 5 B is the part sectioned view of the second simulation aspect of organic electroluminescence display device, and its display unit is for using a tectal comparative example.
Main element symbol description
10,40: the first assemblies
101,401: first substrate
103,403: organic electroluminescence unit
20,50: the second assemblies
201,501: second substrate
203,2031,2032,503,5031,5032: shielding pattern layer
205,505: filter layer
2051,5051,7051: blue sub-filter area
2051a, 5051a: the extension of blue sub-filter area
5052,7052: white sub-filter area
5053,7053: green sub-filter area
5054,7054: red sub-filter area
30,60,74: sept
301: the bottom of sept
303: the top of sept
31: cover layer
32,32 ', 62: packed layer
W
b, W
s: width
W
d: distance
D
1, D
oC, D
pS: thickness
θ, θ ': angle
Embodiment
Following examples propose a kind of organic electroluminescence display device and manufacture method thereof.But the thin portion structure that embodiment proposes and manufacturing process steps are only the use illustrated, not for the scope of protection, limit is done to the present invention.
The organic electroluminescence display device of embodiment is formed group by the first assembly and the second assembly, and with sept control gap between two assemblies.First assembly is such as an organic EL component (OLEDassembly), and the second assembly is such as a colorized optical filtering assembly (CFassembly).Fig. 1 illustrates the part sectioned view of the organic electroluminescence display device according to the embodiment of the present invention.The organic electroluminescence display device of embodiment has the first assembly 10 and the second assembly 20, first assembly 10 is such as that organic EL component has a first substrate 101 and an organic electroluminescence unit 103 is formed on first substrate 101.Second assembly 20 is such as that colorized optical filtering assembly comprises second substrate 201, shielding pattern layer 203 and a filter layer 205, and wherein filter layer 205 to be formed on second substrate 201 and to have multiple colorized optical filtering district.Colorized optical filtering district is such as red, green, blue or/and white sub-filter area etc., and each pixel region comprises each redness, green, blueness or/and white sub-filter area.Shielding pattern layer 203 is formed at second substrate 201 place and is looped around the periphery in those colorized optical filtering districts each respectively.As shown in Figure 1, the periphery of blue sub-filter area 2051 is surrounded with shielding pattern layer 203.
Moreover the organic electroluminescence display device of embodiment also comprises multiple sept (spacers) 30 between the first assembly 10 and the second assembly 20, and a packed layer 32 is between the first assembly 10 and the second assembly 20.And sept 30 contacts with filter layer 205 and to should shielding pattern layer 203 place.Wherein, the bottom 301 of sept 30 contacts the filter layer 305 of the second assembly 20, and top 303 contacts the first assembly 10.Filter layer 205, between shielding pattern layer 203 and sept 30, fill up packed layer 32.
In embodiment, partial colour filter area, at least one sub-filter area has an extension, the sub-filter area 2051 of blueness as shown in Figure 1 has an extension 2051a, extend on its peripheral this corresponding shielding pattern layer 2032, and sept 30 contacts extension 2051a, such as, be formed on extension 2051a.In an embodiment, the width of extension 2051a is greater than shielding pattern layer 2032 width W at place
b1/2nd, and extension 2051a and adjacent colorized optical filtering district (the sub-filter area W of white as shown in Figure 1) have a distance W
d, sept 30 is also recessed in the shielding pattern layer at place, i.e. the bottom width W of sept 30
sbe less than the width W of this shielding pattern layer 2032 at place
b.For example, for avoiding extension 2051a to extend to adjacent filter area 2051 in manufacture craft, the distance W with adjacent colorized optical filtering district 2051 can therefore be reserved
duse for tolerance.With W an embodiment
dcan be 2 μm, if the width W of now shielding pattern layer 2032
bbe greater than 12 μm, be then positioned at bottom 301 width W of the sept 30 on extension 2051a surface
sthe width W of this shielding pattern layer 2032 at place need be less than
b, therefore W
sbe greater than 8 μm.
During practical application, colorized optical filtering district can be arranged in a straight strip type array (strip-typecolorfilterarray) or a square array (quad-typecolorfilterarray).And the sept of embodiment can be formed between two sub-filter areas of different colours.
Fig. 2 illustrates the top view of the single pixel region of display unit of the straight strip type array color filter area according to one embodiment of the invention.Fig. 3 illustrates the generalized section of display unit along hatching AA ' of Fig. 2.Referring to Fig. 2 and Fig. 3.Similarly, organic electroluminescence display device is also formed group by the first assembly 40 (comprising first substrate 501 and an organic electroluminescence unit 503) and the second assembly 50 (comprising second substrate 501, shielding pattern layer 503 and a filter layer 505).Wherein filter layer 505 to be formed on second substrate 501 and to have multiple colorized optical filtering district, and shielding pattern layer 503 is formed at second substrate 501 place respectively around the periphery being positioned at those colorized optical filtering districts.
The colorized optical filtering district of the display unit of embodiment comprises the sub-filter area of multiple blueness 5051, the sub-filter area of multiple white 5052, the sub-filter area of multiple green 5053 and the sub-filter area 5054 of multiple redness, and each pixel region forms with comprising each sub-filter area of redness 5054, green sub-filter area 5053, white sub-filter area 5052 and blueness sub-filter area 5051 strip side by side.Embodiment sept 60 contacts with filter layer 505 and to should shielding pattern layer 203 place; As shown in Figure 3, the bottom 601 of sept 60 contacts the filter layer 505 of the second assembly 50 and is positioned at the width of this corresponding shielding pattern layer 5032, and the top 603 of sept 60 contacts the first assembly 40.And between the first assembly 40 and the second assembly 50, there is a packed layer 62 and fill up filter layer 505, between shielding pattern layer 503 and sept 60.A light source can be utilized to harden (curing) to packed layer after packed layer 62 (being such as colloid) configuration, to fill up the space (airgap) between the first assembly 40 and the second assembly 50, so just can not cause the residual of air or aqueous vapor, stability and the useful life of organic electroluminescence unit in the first assembly can be increased, also can increase the intensity of overall Organic Light-Emitting Device.
Moreover the sept 60 of embodiment is arranged between two sub-filter areas of different colours.During practical application, the thickness due to the sub-filter area of blueness 5051 is greater than the thickness of green sub-filter area 5053 and the sub-filter area 5054 of redness, therefore sept 60 can be arranged at blue sub-filter area 5051 place, but not as limit.As the 2nd, shown in 3 figure, the sept 60 contacted with the extension 5051a of the sub-filter area 5051 of blueness, be arranged between blue sub-filter area 5051 and the sub-filter area 5052 of white, therefore assorted viewing area need not reduce and can possess its good aperture opening ratio.The extension (as 5051a) of sub-filter area and the position between shielding pattern layer and sept 60 are closed and are illustrated please refer to earlier figures 1 extremely related description with width, do not repeat them here.
In addition, the material of the shielding pattern layer 503 of embodiment is such as black matrix" (BM), its formation is such as the mode painting black photoresist (PhotoResist rotating painting, PR), again via pre-baked (PreBake), exposure (Exposure), development (Develope), hard roasting (PostBake), and complete black matrix" (BM).And the material of sept 60 is such as photosensitive type sept (photospacers), as negative type photoresist sept.The material of packed layer 62 is such as epoxy resin (epoxy), acrylate (acrylic), polyester (poly-ester) or polyurethane (Polyurethane), the application of actual fabrication technique can adopt the T58-UR009 of Nagase.During right practical application, the material of shielding pattern layer, sept and packed layer is also looked application feature and is done suitably to select, and the present invention is not restricted this more.
Fig. 4 illustrates the top view of the single pixel region of display unit of the square array color filter area according to another embodiment of the present invention.Its generalized section and cross-section structure with reference to figure 1 and related description thereof, can not repeat them here.As shown in Figure 4, the sub-filter area of blueness 7051 of each pixel region, white sub-filter area 7052, green sub-filter area 7053 and the sub-filter area 7054 of redness are arranged in a square array (quad-typecolorfilterarray), and between the four dice filter areas of sept 74 in pixel region (as intersection).Wherein, certain dice filter area such as blue sub-filter area 7051 of pixel region has an extension 7051a, and extend to the intersection of the sub-filter area of the redness in pixel region, green, blueness and white, sept 74 contacts with extension 7051a.
Colour cast is simulated
Below propose a colour cast simulated experiment, the structure proposed to observe embodiment is checked colors the impact of inclination angle.In colour cast simulated experiment, simulate with the structure of organic electroluminescence display device as shown in Figure 1, its element describes in detail and please refer to previous embodiment.
Fig. 5 A illustrates the part sectioned view of the first simulation aspect of organic electroluminescence display device, and its display unit is a kind of structure of embodiment.Fig. 5 B illustrates the part sectioned view of the second simulation aspect of organic electroluminescence display device, and its display unit is for using a tectal comparative example.
As shown in Figure 5A, as the thickness D of the sub-filter area of blueness
1be 1.3 μm, the thickness D of sept
pSwhen being 2.0 μm, produce colour cast (θ > 63 °) when angle is greater than 63 °.As shown in Figure 5 B, during traditional structure use cover layer 31 (packed layer 32 ' is positioned on packed layer 32), if the thickness D of blue sub-filter area
1be 1.3 μm, cover layer 31 thickness D
oCbe 1.6 μm, the thickness D of sept
pSwhen being 2.0 μm, produce colour cast (θ ' > 50 °) when angle is greater than 50 °.Therefore, from colour cast analog result, the structure of the organic electroluminescence display device of embodiment can improve the situation of colour cast.
Manufacture method
Below propose the manufacture method of a kind of organic electroluminescence display device of embodiment, so those steps are only the use illustrated, and are not used to limit the present invention.Have usually know the knowledgeable when can according to reality implement aspect need those steps are modified or are changed.Referring to Fig. 3, so that the manufacture method of embodiment to be described.
First, one first assembly 40 is provided and one second assembly 50 is provided.First assembly 40 is such as an organic EL component (OLEDassembly), comprises and provides first substrate 401 and form an organic electroluminescence unit 403 on first substrate 401; Second assembly 50 is such as a colorized optical filtering assembly (CFassembly), and comprising provides a second substrate 501, forms filter layer 505 and a shielding pattern layer 503.Filter layer 505 has multiple colorized optical filtering district.Shielding pattern layer 503 be formed at second substrate 501 place and respectively around those colorized optical filtering districts periphery and with sept control gap between two assemblies.Then, form multiple sept (spacers) 60 to contact with filter layer 505 and corresponding shielding pattern layer 503 place.Then, to group first assembly 40 and the second assembly 50, those septs 60 are between the first assembly 40 and the second assembly 50.Afterwards, fill up a packed layer 62 between the first assembly 40 and the second assembly 50, and the packed layer 62 that hardens, wherein filter layer 505, fill up packed layer 62 between shielding pattern layer 503 and sept 60.
Comprehensively above-mentioned, in the organic electroluminescence display device of embodiment, sept contacts with filter layer and can omit cover layer, not only simplify the manufacturing process of display unit, and the integral thickness of also thinning display unit also improves the situation of colour cast.In addition, between the sub-filter area that the sept of embodiment is arranged on different color (such as contacting with an extension at least one colorized optical filtering district 205), therefore assorted viewing area need not reduce and can possess its good aperture opening ratio.
In sum, although disclose the present invention in conjunction with above embodiment, however itself and be not used to limit the present invention.Be familiar with this operator in the technical field of the invention, without departing from the spirit and scope of the present invention, can be used for a variety of modifications and variations.Therefore, what protection scope of the present invention should define with the claim of enclosing is as the criterion.
Claims (14)
1. an organic electroluminescence display device, at least comprises:
First assembly, comprises:
First substrate; And
Organic electroluminescence unit is positioned on this first substrate;
Second assembly, with this first assembly to group, this second assembly comprises:
Second substrate;
Filter layer, to be positioned on this second substrate and to have multiple colorized optical filtering district; And
Shielding pattern layer, to be positioned on this second substrate and to be looped around the periphery in respectively this colorized optical filtering district respectively; And
Sept, to be positioned on this filter layer and to should shielding pattern layer place, and this sept is between this first assembly and this second assembly,
Wherein this at least one colorized optical filtering district has an extension, and this extension extends on its peripheral this corresponding shielding pattern layer, and this sept is contacted with this extension.
2. organic electroluminescence display device as claimed in claim 1, wherein the width of this extension is greater than 1/2nd of this shielding pattern layer width at place.
3. organic electroluminescence display device as claimed in claim 2, wherein the bottom width of this sept is less than the width of this shielding pattern layer at place.
4. organic electroluminescence display device as claimed in claim 1, wherein those colorized optical filtering districts comprise the sub-filter area of multiple redness, the sub-filter area of multiple green, the sub-filter area of multiple blueness and the sub-filter area of multiple white, and each pixel region comprises each sub-filter area of redness, green, blueness and white.
5. organic electroluminescence display device as claimed in claim 4, wherein those colorized optical filtering districts are arranged in a straight strip type array, and this sept is formed between two sub-filter areas of different colours.
6. organic electroluminescence display device as claimed in claim 5, wherein at least one sub-filter area has an extension, this extension to extend on this peripheral corresponding shielding pattern layer but has a distance with its adjacent dice filter area, and this sept is contacted with this extension.
7. organic electroluminescence display device as claimed in claim 4, wherein this redness of each pixel region, green, blueness and the sub-filter area of white are arranged in a square array, and this sept is arranged in the intersection of this redness of this pixel region, green, blueness and the sub-filter area of white.
8. organic electroluminescence display device as claimed in claim 7, wherein at least one sub-filter area has an extension, this extension extends to the intersection of the sub-filter area of this redness, green, blueness and white in this pixel region, and this sept is contacted with this extension.
9. organic electroluminescence display device as claimed in claim 1, also comprises a packed layer between this first assembly and this second assembly, wherein this filter layer, fill up this packed layer between this shielding pattern layer and this sept.
10. organic electroluminescence display device as claimed in claim 1, wherein the bottom of this sept contacts this filter layer of this second assembly and is positioned at the width of this corresponding shielding pattern layer, and this first assembly of the top contact of this sept.
The manufacture method of 11. 1 kinds of organic electroluminescence display devices, comprising:
One first assembly is provided, comprises:
One first substrate is provided;
Form an organic electroluminescence unit on this first substrate;
One second assembly is provided, comprises:
One second substrate is provided;
Form a filter layer on this second substrate, wherein this filter layer has multiple colorized optical filtering district; With
Form a shielding pattern layer is also surrounded on those colorized optical filtering districts respectively periphery in this second substrate place;
Form a sept and contact this filter layer and to should shielding pattern layer place; With
To this first assembly of group and this second assembly, and this sept is between this first assembly and this second assembly,
In the step providing this second assembly, at least one colorized optical filtering district has an extension, and this extension extends on its peripheral this corresponding shielding pattern layer, and this sept is contacted with this extension.
12. manufacture methods as claimed in claim 11, also comprise configuration one packed layer between this first assembly and this second assembly, wherein this filter layer, fill up this packed layer between this shielding pattern layer and this sept.
13. manufacture methods as claimed in claim 11, wherein the bottom of this sept contacts this filter layer and is positioned at the width of this corresponding shielding pattern layer, and this first assembly of top contact to this sept after this first assembly of group and this second assembly.
14. manufacture methods as claimed in claim 11, in the step that this second assembly is provided, the width of this extension is greater than 1/2nd of this shielding pattern layer width at place, and there is a distance in this extension and this adjacent colorized optical filtering district, the bottom width of this sept is less than the width of this shielding pattern layer at place.
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| KR102600694B1 (en) | 2016-10-28 | 2023-11-09 | 엘지디스플레이 주식회사 | Display device having a white emitting area |
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| TWI237520B (en) * | 2004-11-15 | 2005-08-01 | Chunghwa Picture Tubes Ltd | Organic electro-luminescence display and method of fabricating the same |
| CN101635296A (en) * | 2008-07-22 | 2010-01-27 | 乐金显示有限公司 | Organic electro-luminescence display device and manufacturing method thereof |
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| JP5515522B2 (en) * | 2009-08-31 | 2014-06-11 | 大日本印刷株式会社 | Color filter for organic electroluminescence display device and organic electroluminescence display device |
| JP5515845B2 (en) * | 2010-02-23 | 2014-06-11 | 大日本印刷株式会社 | Color filter with resistive touch panel function and display device including the color filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI237520B (en) * | 2004-11-15 | 2005-08-01 | Chunghwa Picture Tubes Ltd | Organic electro-luminescence display and method of fabricating the same |
| CN101635296A (en) * | 2008-07-22 | 2010-01-27 | 乐金显示有限公司 | Organic electro-luminescence display device and manufacturing method thereof |
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